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Design of smart polyacrylates showing thermo-, pH-, and CO2-responsive features

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Abstract

A novel acrylate monomer 2-((3-(isopropylamino)-3-oxopropyl)(methyl)amino)ethyl acrylate (IMA) was synthesized by facile sequential two-step reactions and polymerized using reversible addition–fragmentation chain transfer (RAFT) polymerization to yield a thermo-, pH- and CO2-responsive homopolymer PIMA with a well-defined structure. PIMA showed a lower critical solution temperature (LCST) close to body temperature, and the influence of the degree of polymerization (DP), polymer concentration, salt concentration and substituents on the LCST was investigated. Due to the presence of tertiary amino groups in the side chains, the thermoresponsive phase transition of PIMA was tunable by solution pH and bubbling CO2/N2. The LCST increased with the decrease of pH, and the solubility of PIMA (at a temperature above the LCST) could be reversibly switched back by bubbling CO2/N2.

Graphical abstract: Design of smart polyacrylates showing thermo-, pH-, and CO2-responsive features

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Publication details

The article was received on 19 Sep 2019, accepted on 07 Nov 2019 and first published on 07 Nov 2019


Article type: Paper
DOI: 10.1039/C9PY01410A
Polym. Chem., 2019, Advance Article

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    Design of smart polyacrylates showing thermo-, pH-, and CO2-responsive features

    J. Huang, H. Qin, B. Wang, Q. Tan and J. Lu, Polym. Chem., 2019, Advance Article , DOI: 10.1039/C9PY01410A

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